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<li><a class="reference internal" href="#">Abstract class <strong>Phalcon\Mvc\Model\MetaData</strong></a><ul>
<li><a class="reference internal" href="#constants">Constants</a></li>
<li><a class="reference internal" href="#methods">Methods</a></li>
</ul>
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  <div class="section" id="abstract-class-phalcon-mvc-model-metadata">
<h1>Abstract class <strong>Phalcon\Mvc\Model\MetaData</strong><a class="headerlink" href="#abstract-class-phalcon-mvc-model-metadata" title="永久链接至标题">¶</a></h1>
<p><em>implements</em> <tt class="xref doc docutils literal"><span class="pre">Phalcon\Di\InjectionAwareInterface</span></tt></p>
<p>Because Phalcon\Mvc\Model requires meta-data like field names, data types, primary keys, etc. this component collect them and store for further querying by Phalcon\Mvc\Model. Phalcon\Mvc\Model\MetaData can also use adapters to store temporarily or permanently the meta-data.    A standard Phalcon\Mvc\Model\MetaData can be used to query model attributes:</p>
<div class="highlight-php"><div class="highlight"><pre><span class="cp">&lt;?php</span>

<span class="nv">$metaData</span> <span class="o">=</span> <span class="k">new</span> <span class="nx">\Phalcon\Mvc\Model\MetaData\Memory</span><span class="p">();</span>
<span class="nv">$attributes</span> <span class="o">=</span> <span class="nv">$metaData</span><span class="o">-&gt;</span><span class="na">getAttributes</span><span class="p">(</span><span class="k">new</span> <span class="nx">Robots</span><span class="p">());</span>
<span class="nb">print_r</span><span class="p">(</span><span class="nv">$attributes</span><span class="p">);</span>
</pre></div>
</div>
<div class="section" id="constants">
<h2>Constants<a class="headerlink" href="#constants" title="永久链接至标题">¶</a></h2>
<p><em>integer</em> <strong>MODELS_ATTRIBUTES</strong></p>
<p><em>integer</em> <strong>MODELS_PRIMARY_KEY</strong></p>
<p><em>integer</em> <strong>MODELS_NON_PRIMARY_KEY</strong></p>
<p><em>integer</em> <strong>MODELS_NOT_NULL</strong></p>
<p><em>integer</em> <strong>MODELS_DATA_TYPES</strong></p>
<p><em>integer</em> <strong>MODELS_DATA_TYPES_NUMERIC</strong></p>
<p><em>integer</em> <strong>MODELS_DATE_AT</strong></p>
<p><em>integer</em> <strong>MODELS_DATE_IN</strong></p>
<p><em>integer</em> <strong>MODELS_IDENTITY_COLUMN</strong></p>
<p><em>integer</em> <strong>MODELS_DATA_TYPES_BIND</strong></p>
<p><em>integer</em> <strong>MODELS_AUTOMATIC_DEFAULT_INSERT</strong></p>
<p><em>integer</em> <strong>MODELS_AUTOMATIC_DEFAULT_UPDATE</strong></p>
<p><em>integer</em> <strong>MODELS_DEFAULT_VALUES</strong></p>
<p><em>integer</em> <strong>MODELS_COLUMN_MAP</strong></p>
<p><em>integer</em> <strong>MODELS_REVERSE_COLUMN_MAP</strong></p>
</div>
<div class="section" id="methods">
<h2>Methods<a class="headerlink" href="#methods" title="永久链接至标题">¶</a></h2>
<p>final protected  <strong>_initialize</strong> (<em>unknown</em> $model, <em>unknown</em> $key, <em>unknown</em> $table, <em>unknown</em> $schema)</p>
<p>Initialize the metadata for certain table</p>
<p>public  <strong>setDI</strong> (<em>unknown</em> $dependencyInjector)</p>
<p>Sets the DependencyInjector container</p>
<p>public <a class="reference internal" href="Phalcon_DiInterface.html"><em>Phalcon\DiInterface</em></a>  <strong>getDI</strong> ()</p>
<p>Returns the DependencyInjector container</p>
<p>public  <strong>setStrategy</strong> (<em>unknown</em> $strategy)</p>
<p>Set the meta-data extraction strategy</p>
<p>public <a class="reference internal" href="Phalcon_Mvc_Model_MetaData_StrategyInterface.html"><em>Phalcon\Mvc\Model\MetaData\StrategyInterface</em></a>  <strong>getStrategy</strong> ()</p>
<p>Return the strategy to obtain the meta-data</p>
<p>final public <em>array</em>  <strong>readMetaData</strong> (<em>unknown</em> $model)</p>
<p>Reads the complete meta-data for certain model</p>
<div class="highlight-php"><div class="highlight"><pre><span class="cp">&lt;?php</span>

<span class="nb">print_r</span><span class="p">(</span><span class="nv">$metaData</span><span class="o">-&gt;</span><span class="na">readMetaData</span><span class="p">(</span><span class="k">new</span> <span class="nx">Robots</span><span class="p">());</span>
</pre></div>
</div>
<p>final public <em>mixed</em>  <strong>readMetaDataIndex</strong> (<em>unknown</em> $model, <em>unknown</em> $index)</p>
<p>Reads meta-data for certain model using a MODEL_* constant</p>
<div class="highlight-php"><div class="highlight"><pre><span class="cp">&lt;?php</span>

<span class="nb">print_r</span><span class="p">(</span><span class="nv">$metaData</span><span class="o">-&gt;</span><span class="na">writeColumnMapIndex</span><span class="p">(</span><span class="k">new</span> <span class="nx">Robots</span><span class="p">(),</span> <span class="nx">MetaData</span><span class="o">::</span><span class="na">MODELS_REVERSE_COLUMN_MAP</span><span class="p">,</span> <span class="k">array</span><span class="p">(</span><span class="s1">&#39;leName&#39;</span> <span class="o">=&gt;</span> <span class="s1">&#39;name&#39;</span><span class="p">)));</span>
</pre></div>
</div>
<p>final public  <strong>writeMetaDataIndex</strong> (<em>unknown</em> $model, <em>unknown</em> $index, <em>unknown</em> $data)</p>
<p>Writes meta-data for certain model using a MODEL_* constant</p>
<div class="highlight-php"><div class="highlight"><pre><span class="cp">&lt;?php</span>

<span class="nb">print_r</span><span class="p">(</span><span class="nv">$metaData</span><span class="o">-&gt;</span><span class="na">writeColumnMapIndex</span><span class="p">(</span><span class="k">new</span> <span class="nx">Robots</span><span class="p">(),</span> <span class="nx">MetaData</span><span class="o">::</span><span class="na">MODELS_REVERSE_COLUMN_MAP</span><span class="p">,</span> <span class="k">array</span><span class="p">(</span><span class="s1">&#39;leName&#39;</span> <span class="o">=&gt;</span> <span class="s1">&#39;name&#39;</span><span class="p">)));</span>
</pre></div>
</div>
<p>final public <em>array</em>  <strong>readColumnMap</strong> (<em>unknown</em> $model)</p>
<p>Reads the ordered/reversed column map for certain model</p>
<div class="highlight-php"><div class="highlight"><pre><span class="cp">&lt;?php</span>

<span class="nb">print_r</span><span class="p">(</span><span class="nv">$metaData</span><span class="o">-&gt;</span><span class="na">readColumnMap</span><span class="p">(</span><span class="k">new</span> <span class="nx">Robots</span><span class="p">()));</span>
</pre></div>
</div>
<p>final public  <strong>readColumnMapIndex</strong> (<em>unknown</em> $model, <em>unknown</em> $index)</p>
<p>Reads column-map information for certain model using a MODEL_* constant</p>
<div class="highlight-php"><div class="highlight"><pre><span class="cp">&lt;?php</span>

<span class="nb">print_r</span><span class="p">(</span><span class="nv">$metaData</span><span class="o">-&gt;</span><span class="na">readColumnMapIndex</span><span class="p">(</span><span class="k">new</span> <span class="nx">Robots</span><span class="p">(),</span> <span class="nx">MetaData</span><span class="o">::</span><span class="na">MODELS_REVERSE_COLUMN_MAP</span><span class="p">));</span>
</pre></div>
</div>
<p>public <em>array</em>  <strong>getAttributes</strong> (<a class="reference internal" href="Phalcon_Mvc_ModelInterface.html"><em>Phalcon\Mvc\ModelInterface</em></a> $model)</p>
<p>Returns table attributes names (fields)</p>
<div class="highlight-php"><div class="highlight"><pre><span class="cp">&lt;?php</span>

<span class="nb">print_r</span><span class="p">(</span><span class="nv">$metaData</span><span class="o">-&gt;</span><span class="na">getAttributes</span><span class="p">(</span><span class="k">new</span> <span class="nx">Robots</span><span class="p">()));</span>
</pre></div>
</div>
<p>public <em>array</em>  <strong>getPrimaryKeyAttributes</strong> (<em>unknown</em> $model)</p>
<p>Returns an array of fields which are part of the primary key</p>
<div class="highlight-php"><div class="highlight"><pre><span class="cp">&lt;?php</span>

<span class="nb">print_r</span><span class="p">(</span><span class="nv">$metaData</span><span class="o">-&gt;</span><span class="na">getPrimaryKeyAttributes</span><span class="p">(</span><span class="k">new</span> <span class="nx">Robots</span><span class="p">()));</span>
</pre></div>
</div>
<p>public <em>array</em>  <strong>getNonPrimaryKeyAttributes</strong> (<em>unknown</em> $model)</p>
<p>Returns an array of fields which are not part of the primary key</p>
<div class="highlight-php"><div class="highlight"><pre><span class="cp">&lt;?php</span>

<span class="nb">print_r</span><span class="p">(</span><span class="nv">$metaData</span><span class="o">-&gt;</span><span class="na">getNonPrimaryKeyAttributes</span><span class="p">(</span><span class="k">new</span> <span class="nx">Robots</span><span class="p">()));</span>
</pre></div>
</div>
<p>public <em>array</em>  <strong>getNotNullAttributes</strong> (<em>unknown</em> $model)</p>
<p>Returns an array of not null attributes</p>
<div class="highlight-php"><div class="highlight"><pre><span class="cp">&lt;?php</span>

<span class="nb">print_r</span><span class="p">(</span><span class="nv">$metaData</span><span class="o">-&gt;</span><span class="na">getNotNullAttributes</span><span class="p">(</span><span class="k">new</span> <span class="nx">Robots</span><span class="p">()));</span>
</pre></div>
</div>
<p>public <em>array</em>  <strong>getDataTypes</strong> (<em>unknown</em> $model)</p>
<p>Returns attributes and their data types</p>
<div class="highlight-php"><div class="highlight"><pre><span class="cp">&lt;?php</span>

<span class="nb">print_r</span><span class="p">(</span><span class="nv">$metaData</span><span class="o">-&gt;</span><span class="na">getDataTypes</span><span class="p">(</span><span class="k">new</span> <span class="nx">Robots</span><span class="p">()));</span>
</pre></div>
</div>
<p>public <em>array</em>  <strong>getDataTypesNumeric</strong> (<em>unknown</em> $model)</p>
<p>Returns attributes which types are numerical</p>
<div class="highlight-php"><div class="highlight"><pre><span class="cp">&lt;?php</span>

<span class="nb">print_r</span><span class="p">(</span><span class="nv">$metaData</span><span class="o">-&gt;</span><span class="na">getDataTypesNumeric</span><span class="p">(</span><span class="k">new</span> <span class="nx">Robots</span><span class="p">()));</span>
</pre></div>
</div>
<p>public <em>string</em>  <strong>getIdentityField</strong> (<em>unknown</em> $model)</p>
<p>Returns the name of identity field (if one is present)</p>
<div class="highlight-php"><div class="highlight"><pre><span class="cp">&lt;?php</span>

<span class="nb">print_r</span><span class="p">(</span><span class="nv">$metaData</span><span class="o">-&gt;</span><span class="na">getIdentityField</span><span class="p">(</span><span class="k">new</span> <span class="nx">Robots</span><span class="p">()));</span>
</pre></div>
</div>
<p>public <em>array</em>  <strong>getBindTypes</strong> (<em>unknown</em> $model)</p>
<p>Returns attributes and their bind data types</p>
<div class="highlight-php"><div class="highlight"><pre><span class="cp">&lt;?php</span>

<span class="nb">print_r</span><span class="p">(</span><span class="nv">$metaData</span><span class="o">-&gt;</span><span class="na">getBindTypes</span><span class="p">(</span><span class="k">new</span> <span class="nx">Robots</span><span class="p">()));</span>
</pre></div>
</div>
<p>public <em>array</em>  <strong>getAutomaticCreateAttributes</strong> (<em>unknown</em> $model)</p>
<p>Returns attributes that must be ignored from the INSERT SQL generation</p>
<div class="highlight-php"><div class="highlight"><pre><span class="cp">&lt;?php</span>

<span class="nb">print_r</span><span class="p">(</span><span class="nv">$metaData</span><span class="o">-&gt;</span><span class="na">getAutomaticCreateAttributes</span><span class="p">(</span><span class="k">new</span> <span class="nx">Robots</span><span class="p">()));</span>
</pre></div>
</div>
<p>public <em>array</em>  <strong>getAutomaticUpdateAttributes</strong> (<em>unknown</em> $model)</p>
<p>Returns attributes that must be ignored from the UPDATE SQL generation</p>
<div class="highlight-php"><div class="highlight"><pre><span class="cp">&lt;?php</span>

<span class="nb">print_r</span><span class="p">(</span><span class="nv">$metaData</span><span class="o">-&gt;</span><span class="na">getAutomaticUpdateAttributes</span><span class="p">(</span><span class="k">new</span> <span class="nx">Robots</span><span class="p">()));</span>
</pre></div>
</div>
<p>public  <strong>setAutomaticCreateAttributes</strong> (<em>unknown</em> $model, <em>unknown</em> $attributes)</p>
<p>Set the attributes that must be ignored from the INSERT SQL generation</p>
<div class="highlight-php"><div class="highlight"><pre><span class="cp">&lt;?php</span>

<span class="nv">$metaData</span><span class="o">-&gt;</span><span class="na">setAutomaticCreateAttributes</span><span class="p">(</span><span class="k">new</span> <span class="nx">Robots</span><span class="p">(),</span> <span class="k">array</span><span class="p">(</span><span class="s1">&#39;created_at&#39;</span> <span class="o">=&gt;</span> <span class="k">true</span><span class="p">));</span>
</pre></div>
</div>
<p>public  <strong>setAutomaticUpdateAttributes</strong> (<em>unknown</em> $model, <em>unknown</em> $attributes)</p>
<p>Set the attributes that must be ignored from the UPDATE SQL generation</p>
<div class="highlight-php"><div class="highlight"><pre><span class="cp">&lt;?php</span>

<span class="nv">$metaData</span><span class="o">-&gt;</span><span class="na">setAutomaticUpdateAttributes</span><span class="p">(</span><span class="k">new</span> <span class="nx">Robots</span><span class="p">(),</span> <span class="k">array</span><span class="p">(</span><span class="s1">&#39;modified_at&#39;</span> <span class="o">=&gt;</span> <span class="k">true</span><span class="p">));</span>
</pre></div>
</div>
<p>public <em>array</em>  <strong>getDefaultValues</strong> (<em>unknown</em> $model)</p>
<p>Returns attributes (which have default values) and their default values</p>
<div class="highlight-php"><div class="highlight"><pre><span class="cp">&lt;?php</span>

<span class="nb">print_r</span><span class="p">(</span><span class="nv">$metaData</span><span class="o">-&gt;</span><span class="na">getDefaultValues</span><span class="p">(</span><span class="k">new</span> <span class="nx">Robots</span><span class="p">()));</span>
</pre></div>
</div>
<p>public <em>array</em>  <strong>getColumnMap</strong> (<em>unknown</em> $model)</p>
<p>Returns the column map if any</p>
<div class="highlight-php"><div class="highlight"><pre><span class="cp">&lt;?php</span>

<span class="nb">print_r</span><span class="p">(</span><span class="nv">$metaData</span><span class="o">-&gt;</span><span class="na">getColumnMap</span><span class="p">(</span><span class="k">new</span> <span class="nx">Robots</span><span class="p">()));</span>
</pre></div>
</div>
<p>public <em>array</em>  <strong>getReverseColumnMap</strong> (<em>unknown</em> $model)</p>
<p>Returns the reverse column map if any</p>
<div class="highlight-php"><div class="highlight"><pre><span class="cp">&lt;?php</span>

<span class="nb">print_r</span><span class="p">(</span><span class="nv">$metaData</span><span class="o">-&gt;</span><span class="na">getReverseColumnMap</span><span class="p">(</span><span class="k">new</span> <span class="nx">Robots</span><span class="p">()));</span>
</pre></div>
</div>
<p>public <em>boolean</em>  <strong>hasAttribute</strong> (<em>unknown</em> $model, <em>unknown</em> $attribute)</p>
<p>Check if a model has certain attribute</p>
<div class="highlight-php"><div class="highlight"><pre><span class="cp">&lt;?php</span>

<span class="nb">var_dump</span><span class="p">(</span><span class="nv">$metaData</span><span class="o">-&gt;</span><span class="na">hasAttribute</span><span class="p">(</span><span class="k">new</span> <span class="nx">Robots</span><span class="p">(),</span> <span class="s1">&#39;name&#39;</span><span class="p">));</span>
</pre></div>
</div>
<p>public <em>boolean</em>  <strong>isEmpty</strong> ()</p>
<p>Checks if the internal meta-data container is empty</p>
<div class="highlight-php"><div class="highlight"><pre><span class="cp">&lt;?php</span>

<span class="nb">var_dump</span><span class="p">(</span><span class="nv">$metaData</span><span class="o">-&gt;</span><span class="na">isEmpty</span><span class="p">());</span>
</pre></div>
</div>
<p>public  <strong>reset</strong> ()</p>
<p>Resets internal meta-data in order to regenerate it</p>
<div class="highlight-php"><div class="highlight"><pre><span class="cp">&lt;?php</span>

<span class="nv">$metaData</span><span class="o">-&gt;</span><span class="na">reset</span><span class="p">();</span>
</pre></div>
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